一个典型的MacOSX应用程序的大部分时间在用在kevent系统调用上，等待从内核来的事件来唤醒它。
A typical Mac OS X application spends most of its time in the kevent system call, waiting for an event from the kernel to wake it up.
一个典型的MacOSX应用程序的大部分时间在用在kevent系统调用上，等待从内核来的事件来唤醒它。
A typical Mac OS X application spends most of its time in the kevent system call, waiting for an event from the kernel to wake it up.
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